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No.' 503,923, Patented Aug. 22, 1893. f

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, To a/ZZ whom it may concern.-

UNITED STATES `PATENT OEETCE.

JOHN WOLF, JR., OF CINCINNATI, OHIO, ASSIGNOR OF ONE-HALF TO JACOB BLOCH, OF SAME PLACE.

CLUTCH.

SPECIFICATION forming part of Letters Patent No. 503,923, dated August 22, 1893.

Application filed May 17. 1893.

Be it known that I, JOHN ,WOLEg Jr., a citi zen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented cert/ain new and useful Improvements in Friction-Clutches; andI do hereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in friction clutches.

The primary object of the invention is to provide means for first frictionally engaging and causing a band-wheel or pulley to rotate with the driving shaft and then locking the same to the shaft so that the pulleyr shall not slip so long as the clutch devices are engaged.

A further object is to provide a friction clutch which shall be simple in construction, inexpensive in manufacture and eiicient and reliable in use.

The invention will rst be described with reference to the accompanying drawings, which form a part of this specification, and then particularly pointed out in the claims at the end of the description. l

Referring to the drawings, in which similar letters are used to denote similar parts in the different views, Figure l represents a longitudinal sectional elevation of a friction clutch embodying my invention, and Fig. 2 is a sectional end elevation on the line II-II of Fig. 1.

The baud -wheel or pulley A, is placed loosely on the main or driving shaft B, so as to revolve freely thereon independently of the shaft, and the hub thereof is preferably provided with annular recesses in which may be fitted Babbitt or other anti-friction metal, as indicated at a. The pulley A, is confined against endwise movement on the shaft between a collar B and the hub of the spider C, C', which parts may be secured to the shaft so as to rotate therewith by means of set screws b, c, as shown, or in any proper manner. The pulley A, at the side thereof adjacent to the spider is provided or formed with a cylindrical iiange A', and its hub at the same side is provided with curved or arc slots a', for a purpose to be described. The spider Serial No. 474,576. (No model.)

may consist of a hub C, and two (more or less) radial arms C', to which are pivoted clutch levers D, D, to the shorter arms of which are fixed clutch blocks d, of wood or other fibrous material, which are adapted to impinge upon the ring or flange A,so as to compel the pulley to rotate with the shaft..\ The levers D, D, have a toggle-joint connection with links E, E, the opposite ends of which are pivoted to a sliding collar or sleeve F, which is keyed to the driving shaft B, by spline and groove, or other suitable connection, so that the collar may move longitudinally upon and also rotate with the shaft. By this means, as will be seen, when the collar F is moved toward the pulley pressure will be applied through the toggle-levers D, E, upon the rim or flange A', causing the blocks d, d, to exert an increasing pressure upon the flange so as to frictionally engage and bind the pulley to the spider sufficiently to cause the pulley and spider to rotate together with the shaft. Foi convenience of operation the collar F, may be grooved, as at f, to receive a strap which may be connected with an operating lever in a well-known manner for the purpose of sliding the collar along the shaft.

Between the spider hub C, and collar F, is placed a second sliding collar or sleeve G, fromwhich pins g, g, project through openings in the hub of the spider in position to engage the arc slots et', in the hub of the pul ley when the sleeve G, is slid inward or toward the pulley, so as to lock the pulley to the spider and compel the two to rotate together as one and thereby prevent the pulley from slipping. The collar G, may be connected with the collar F, by a headed bolt or bolts f', projecting from the collar F', with the head or heads f2, thereof fitting in an opening or openings g', extending partially through the collar G, so that the bolt f may have a limited movement independent of said collar to permit the latter to remain stationary until the collar F, has moved inward sufficiently to cause the clutch blocks to engage the circular iiange A', and start the pulley,` whereupon the collar F, by contact with the collar G, will slide the latter toward the pulley and cause the pins g,.to engage the arc slots of, and thus lock the pulley to the shaft.

IOO

@oiled or other suitable springs H, H, mayconnect the long arms of the levers l), with the hub of the spider, or other suitable part of the clutch mechanism, so as to exert a constant inward pull upon the long arms of the clutch levers, tending to disengagethe clutchl blocks and serving to hold the parts disengaged when the operating lever (not shown)` is released.

The operation of my invention Will .be

readily understood from the foregoing dcscription taken in connection with the accom" When Athe operating les panying drawings. ver is moved so as to force the collar Rinward toward the pulley A, the toggle-jointed levers will exert a gradually increasing force tending to bind the clutch blocks to the circular flange on the pulley, Wherebythe `latter will be frictionally engaged with vthe `shaft and caused to rotate therewith, and Vas the inward movement of thecollar continues the collar G, willbe slid inward soas to engage thelocking pins g, with the arc slots a', and` when the pins reach the ends ofthe are slots the clutch blocks from the circular flange.

.This clutch may also be used forfthe pur `pose of coupling the abuttingends oftwo` lndependent shafts or shaft sections, in which case thepulley-Will belplaced upon-the end of one shaft andthe spider, sliding collar and lntermediate sliding sleeve carrying Vthe lock,

ing pins will be placed on `the abutting end of the adjacent shaft or shaft section.V ;It `may. also be desirable in some cases `11o-provide countersinks inthe openings in the hub of the spider through which the locking pins` pass, .in which may be `seated coiled or .otherl suitable springs, as shown in Fig. l, surround-` ing/the pins and pressingthesleeveoutWard to "prevent `the sleeve from moving `inward until engaged by the sliding collar.

Letters Patent of the United States, is

l. The band Wheel or pulley providedatone` side with a circular langeor ring and having arcslots inthe hub thereof, in combination with `thehub `having radial arms, the sleeve adjacent Vto said `hub carrying locking pins adapted to engage said arc slots, the collar adjacent to said sleeve, clutch levers pivotally supported upon said radial arms and Other equivalent means may alsolbe substitutedjfor 1 the sliding pins for the "purpose of 'locking the l.parts together afterthe speed of thekpulley has attained approximately the speed `ofl `the driving shaft to which it-is to be locked.;

`Having thus-fully described my inventionp whatl vclaim as new, and desire to secure byz collar saidgpulley will irst `be frictionally enside with a circular flange or ring and having arc slots in the hub thereof, in combination with the hub having radial arms, the sleeve adjacent to said hub carrying locking pins adapted to engage said arc slots, the collar adjacent to said sleeve, clutch levers pivot- `ally. supported `upon said radial arms and adapted to .impinge at one end upon said iiange and having their outer ends pivoted to connecting links the opposite ends of which are pivoted to said collar,andspringstending to disengage said clutch levers and locking pins, substantially as described.

3. A "friction clutch comprising-thegpulley loose on the main driving shaft, thesliding collar keyed on said sl1aft,the spider,"thepiv oted levers carrying the clutch iblocks, the linksconnecting `said levers and collar, the intermediate -sliding-collaror sleevecarrying the lockingpins-adapted to engage arcislots in the hub of thepulley,yand connectionsbetween `said sliding collar and sleeve,whereby the `pulley Will be frictionallygearedtoithe drivingshaft 'on the initial movement of the clutch operating/collar yand locked theretoon the continuation of this -movement by said locking pins, substantiallyas described.

4. In combination Withthe circular flange, `the spider, the` pivoted clutch leversprovided with Athe Yclutch blocks, the slidingcollanthe linkspivotally connecting `said levers and collar, `the springs-tending `to dsengageisaid clutch blocks, the sleeve `placed betweenvsaid collar and spider, and means carriedbyisaid sleevefor locking the `pulley to the spiderat a predetermined point in the movement of Lthe clutch levers, Wherebythepulleyis rst *frictionally geared tothe drivingshaftand-then locked thereto, substantially as described.

5. In combination wvith `the `loose pulley having are slotsin thehubthereof,the`clutch levers and rcollar and pymeans Ifont'rictionally gearing saidpulleyto the main` driving-shaft, :mechanism adapted to operate at a `predetermined pointiinthe `movement vof the lfriction gearing and lock the pulleytotheshaft, comprising a sliding sleevecarrying locking `pins for engaging said arc slots in the hub of the pulley and "connectionsbetweenfsaid sleeve and collar for operating the y same, `whereby `on the `forward movement `of said gaged and caused `to turn with the shaftand then locked -to Ithe shaft, and -vicoversa,sub stantially as described.

`6. In afriction clutch, the combination with Vthe pulley loose `on the imain `driving shaft and providedwith arc slots in-the-hub thereof and with a circular flange or ring, of `theslidn ing collar keyed on said shaft, the pivoted le- TOO IIO

503,923 y 3ft vers connected with clutch blocks which are In tesbimonyvwhereofl ax mysignature in adapted to impinge on said flange, the links presence of two witnesses.

connecting said lovers and collar, and the intermediate sliding collar or sleeve carrying JOHN WOLF JR' 5 locking pins adapted to engage said are slots Witnesses:

in the hub of the pulley, substantially as de- T. J. COLLINS,

scribed. WM. LAUDWEHR. 

